Summary of Significant Accounting Policies - Additional Information (Detail)	12 Months Ended
	Dec. 31, 2019
Maximum [Member]
Property, Plant and Equipment [Line Items]
Lessee, Operating Lease, Term of Contract	5 years
Maximum [Member] | Gathering systems
Property, Plant and Equipment [Line Items]
Useful life	20 years
Maximum [Member] | Other property and equipment
Property, Plant and Equipment [Line Items]
Useful life	20 years
Minimum [Member]
Property, Plant and Equipment [Line Items]
Lessee, Operating Lease, Term of Contract	2 years
Minimum [Member] | Gathering systems
Property, Plant and Equipment [Line Items]
Useful life	15 years
Minimum [Member] | Other property and equipment
Property, Plant and Equipment [Line Items]
Useful life	3 years